{"title":"不同运行条件下电能质量事件对实验性开放结构直流纳米电网供电负载的影响","authors":"","doi":"10.1016/j.epsr.2024.111082","DOIUrl":null,"url":null,"abstract":"<div><p>This paper presents an experimental study on Power Quality (PQ) using indicators to assess the impact on loads supplied by a Low Voltage Open Structure Direct Current Nanogrid (LVOSDCN) utilizing off-the-shelf equipment and passively regulated in 24 V, implemented in real scale in the Amazon Region. Four tests were performed to evaluate the regular occurrence of PQ events with different irradiance profiles and commercial loads. The characteristics of the distribution grid, measurement instruments, and load groups are presented. As a result, variations in RMS voltage under the influence of the irradiance profile reach values above 1.1 PU with a duration of over 1 min, causing failures in some loads. Oscillatory transient events, resulting from the activation of DC-DC converters with time below a few milliseconds, without causing impacts. Finally, the evaluation of voltage ripple using the RMS ripple factor showed maximum values close to 5 %, with different magnitudes over time and at different points of the distribution grid, also having an increase in circulating non-active power. These results are important because the operation of the real scale nanogrid and experimental setup show the magnitudes at which these events can cause failures or damage to the loads supplied by this system.</p></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":null,"pages":null},"PeriodicalIF":3.3000,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378779624009672/pdfft?md5=f2fb50c2b7ffe245f0b6835616f02d2c&pid=1-s2.0-S0378779624009672-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Impacts of power quality events on supplying loads in an experimental open structure DC nanogrid under different operating conditions\",\"authors\":\"\",\"doi\":\"10.1016/j.epsr.2024.111082\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This paper presents an experimental study on Power Quality (PQ) using indicators to assess the impact on loads supplied by a Low Voltage Open Structure Direct Current Nanogrid (LVOSDCN) utilizing off-the-shelf equipment and passively regulated in 24 V, implemented in real scale in the Amazon Region. Four tests were performed to evaluate the regular occurrence of PQ events with different irradiance profiles and commercial loads. The characteristics of the distribution grid, measurement instruments, and load groups are presented. As a result, variations in RMS voltage under the influence of the irradiance profile reach values above 1.1 PU with a duration of over 1 min, causing failures in some loads. Oscillatory transient events, resulting from the activation of DC-DC converters with time below a few milliseconds, without causing impacts. Finally, the evaluation of voltage ripple using the RMS ripple factor showed maximum values close to 5 %, with different magnitudes over time and at different points of the distribution grid, also having an increase in circulating non-active power. These results are important because the operation of the real scale nanogrid and experimental setup show the magnitudes at which these events can cause failures or damage to the loads supplied by this system.</p></div>\",\"PeriodicalId\":50547,\"journal\":{\"name\":\"Electric Power Systems Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2024-09-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0378779624009672/pdfft?md5=f2fb50c2b7ffe245f0b6835616f02d2c&pid=1-s2.0-S0378779624009672-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electric Power Systems Research\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0378779624009672\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electric Power Systems Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378779624009672","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
摘要
本文介绍了一项关于电能质量(PQ)的实验研究,使用指标来评估利用现成设备和被动调节 24 V 电压的低压开放式结构直流纳米电网(LVOSDCN)对负载的影响。共进行了四次测试,以评估不同辐照度曲线和商业负载下 PQ 事件的定期发生情况。报告介绍了配电网、测量仪器和负载组的特性。结果发现,在辐照度曲线的影响下,电压有效值的变化达到 1.1 PU 以上,持续时间超过 1 分钟,导致某些负载出现故障。直流-直流转换器启动时产生的振荡瞬态事件持续时间低于几毫秒,但不会造成影响。最后,使用有效值纹波因数对电压纹波进行的评估显示,最大值接近 5%,随着时间的推移,在配电网的不同点会出现不同的幅度,循环非有功功率也会增加。这些结果非常重要,因为实际规模的纳米电网的运行和实验装置显示了这些事件可能导致故障或对该系统供电的负载造成损害的程度。
Impacts of power quality events on supplying loads in an experimental open structure DC nanogrid under different operating conditions
This paper presents an experimental study on Power Quality (PQ) using indicators to assess the impact on loads supplied by a Low Voltage Open Structure Direct Current Nanogrid (LVOSDCN) utilizing off-the-shelf equipment and passively regulated in 24 V, implemented in real scale in the Amazon Region. Four tests were performed to evaluate the regular occurrence of PQ events with different irradiance profiles and commercial loads. The characteristics of the distribution grid, measurement instruments, and load groups are presented. As a result, variations in RMS voltage under the influence of the irradiance profile reach values above 1.1 PU with a duration of over 1 min, causing failures in some loads. Oscillatory transient events, resulting from the activation of DC-DC converters with time below a few milliseconds, without causing impacts. Finally, the evaluation of voltage ripple using the RMS ripple factor showed maximum values close to 5 %, with different magnitudes over time and at different points of the distribution grid, also having an increase in circulating non-active power. These results are important because the operation of the real scale nanogrid and experimental setup show the magnitudes at which these events can cause failures or damage to the loads supplied by this system.
期刊介绍:
Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview.
• Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation.
• Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design.
• Substation work: equipment design, protection and control systems.
• Distribution techniques, equipment development, and smart grids.
• The utilization area from energy efficiency to distributed load levelling techniques.
• Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.